3
Question
Draw a labelled sketch of a class III lever. Give one example of this kind of lever.
[ 3 marks ]
[ 3 marks ]
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Solution
The Class of Lever is determined by the location of the load, fulcrum, and force.
In a Class Three Lever, the Force is between the Load and the Fulcrum. If the Force is closer to the Load, it would be easier to lift and a mechanical advantage. Examples are shovels, fishing rods, human arms and legs, tweezers, and ice tongs.
[ 1.5 marks ]
A fishing rod is an example of a Class Three Lever. The Load of course is the big fish at the end of the line and top of the rod. The Beam is the rod itself, and the Force is the person reeling in the fish using the rod's handle between the two ends. The Fulcrum is the bottom part of the handle of the rod.
[ 1.5 marks ]
The Class of Lever is determined by the location of the load, fulcrum, and force.
In a Class Three Lever, the Force is between the Load and the Fulcrum. If the Force is closer to the Load, it would be easier to lift and a mechanical advantage. Examples are shovels, fishing rods, human arms and legs, tweezers, and ice tongs.
[ 1.5 marks ]
A fishing rod is an example of a Class Three Lever. The Load of course is the big fish at the end of the line and top of the rod. The Beam is the rod itself, and the Force is the person reeling in the fish using the rod's handle between the two ends. The Fulcrum is the bottom part of the handle of the rod.
[ 1.5 marks ]
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